ceremorphosis

Interesting detail on the 27″ iMac:

Mini DisplayPort.
The Mini DisplayPort lets you connect an external display, including the Apple LED Cinema Display, to your iMac. On the 27-inch iMac, the same port offers input, too. So you can connect any external source that has DisplayPort output — including a MacBook or MacBook Pro — and use your iMac as a display.

You can use the 27″ as an external display. Shame more devices don’t have mini-displayport. I’m sure there’s a cable for that.